Dont divorce in a rush. Book a trip with you and your wife. Just you two and go back to the places you have met. Pick up some good memories and break the ice.
After you both back to normal mood have a good talk on the situation
You understand that she couldnt get along with your mum. There is a generation gap. We all dont get along with old people very well. Can you kindly suggest that you two back to your own little world. Send her parents home too. The two can not get along well with old people around no matter her parents or your parents. You guy would be happy again once old people are no longer involved in your life.
Dont rely on them to take care of your kids. Send the kids to day care if money isnt an issue.
Good luck! "Ren yi shi feng ping lang jing, Tui yi bu hai kuo tian kong"